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https://opencores.org/ocsvn/openrisc_2011-10-31/openrisc_2011-10-31/trunk
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[/] [openrisc/] [trunk/] [gnu-src/] [newlib-1.18.0/] [newlib/] [libc/] [stdio/] [fdopen.c] - Rev 527
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/* * Copyright (c) 1990 The Regents of the University of California. * All rights reserved. * * Redistribution and use in source and binary forms are permitted * provided that the above copyright notice and this paragraph are * duplicated in all such forms and that any documentation, * advertising materials, and other materials related to such * distribution and use acknowledge that the software was developed * by the University of California, Berkeley. The name of the * University may not be used to endorse or promote products derived * from this software without specific prior written permission. * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. */ /* FUNCTION <<fdopen>>---turn open file into a stream INDEX fdopen INDEX _fdopen_r ANSI_SYNOPSIS #include <stdio.h> FILE *fdopen(int <[fd]>, const char *<[mode]>); FILE *_fdopen_r(struct _reent *<[reent]>, int <[fd]>, const char *<[mode]>); TRAD_SYNOPSIS #include <stdio.h> FILE *fdopen(<[fd]>, <[mode]>) int <[fd]>; char *<[mode]>; FILE *_fdopen_r(<[reent]>, <[fd]>, <[mode]>) struct _reent *<[reent]>; int <[fd]>; char *<[mode]>); DESCRIPTION <<fdopen>> produces a file descriptor of type <<FILE *>>, from a descriptor for an already-open file (returned, for example, by the system subroutine <<open>> rather than by <<fopen>>). The <[mode]> argument has the same meanings as in <<fopen>>. RETURNS File pointer or <<NULL>>, as for <<fopen>>. PORTABILITY <<fdopen>> is ANSI. */ #include <_ansi.h> #include <reent.h> #include <sys/types.h> #include <sys/fcntl.h> #include <stdio.h> #include <errno.h> #include "local.h" #include <_syslist.h> FILE * _DEFUN(_fdopen_r, (ptr, fd, mode), struct _reent *ptr _AND int fd _AND _CONST char *mode) { register FILE *fp; int flags, oflags; #ifdef HAVE_FCNTL int fdflags, fdmode; #endif if ((flags = __sflags (ptr, mode, &oflags)) == 0) return 0; /* make sure the mode the user wants is a subset of the actual mode */ #ifdef HAVE_FCNTL if ((fdflags = _fcntl_r (ptr, fd, F_GETFL, 0)) < 0) return 0; fdmode = fdflags & O_ACCMODE; if (fdmode != O_RDWR && (fdmode != (oflags & O_ACCMODE))) { ptr->_errno = EBADF; return 0; } #endif if ((fp = __sfp (ptr)) == 0) return 0; _flockfile (fp); fp->_flags = flags; /* POSIX recommends setting the O_APPEND bit on fd to match append streams. Someone may later clear O_APPEND on fileno(fp), but the stream must still remain in append mode. Rely on __sflags setting __SAPP properly. */ #ifdef HAVE_FCNTL if ((oflags & O_APPEND) && !(fdflags & O_APPEND)) _fcntl_r (ptr, fd, F_SETFL, fdflags | O_APPEND); #endif fp->_file = fd; fp->_cookie = (_PTR) fp; #undef _read #undef _write #undef _seek #undef _close fp->_read = __sread; fp->_write = __swrite; fp->_seek = __sseek; fp->_close = __sclose; #ifdef __SCLE /* Explicit given mode results in explicit setting mode on fd */ if (oflags & O_BINARY) setmode (fp->_file, O_BINARY); else if (oflags & O_TEXT) setmode (fp->_file, O_TEXT); if (__stextmode (fp->_file)) fp->_flags |= __SCLE; #endif _funlockfile (fp); return fp; } #ifndef _REENT_ONLY FILE * _DEFUN(fdopen, (fd, mode), int fd _AND _CONST char *mode) { return _fdopen_r (_REENT, fd, mode); } #endif
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